GB/T 29079-2012Classification and parameter symbols for the orbits and trajectories of spacecraft (English PDF)

航天器轨道分类及常用参数符号

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

Level / Type

National · Recommended

Issue date

December 31, 2012

Implementation date

July 1, 2013

Scope

GB/T 29079-2012 is the English-translated version of 航天器轨道分类及常用参数符号.

China's national standard for the classification of spacecraft orbits and trajectories and the symbols used for their common parameters. It defines the orbit classes and fixes the notation for the parameters that describe them. Every organisation that works on spacecraft uses orbital concepts constantly, and before a common standard each used its own terms and its own symbols. The introduction states the consequence plainly: different research units used different symbols and different concepts for the same orbital parameters, which created communication barriers and a great deal of duplicated work in spacecraft development. That is a real cost rather than an aesthetic complaint. A mission involves a spacecraft designer, a launch vehicle contractor, a ground segment, a payload team and an operations centre, frequently in different organisations, exchanging orbit definitions in documents and in software interfaces. A parameter that means the semi-major axis in one document and the mean radius in another, or an argument of perigee measured from a different reference, produces an error that is not detected until something does not close - and orbital errors of that kind have ended missions elsewhere. So the standard does two things. It classifies orbits, by altitude, by inclination, by period and by the special cases the discipline names - geostationary, sun-synchronous, Molniya, transfer and parking orbits - so that a class can be referred to without describing it. And it fixes the symbols for the parameters: the classical elements, the state vector, the ground track and coverage quantities, the epoch and time systems, and the reference frames they are expressed in. Issued on 31 December 2012 and in force since 1 July 2013.

Document preview — GB/T 29079-2012

National Standard of the People's Republic of China

ICS: 01.040.49
Classification: V 04

Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

1 Scope
2 Spacecraft orbit classification
2.1 Classification orbit
2.1.1 Classification orbital eccentricity
2.1.2 Classification by orbital inclination
2.1.3 Classification by orbital altitude

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Aerospace Science and Technology Corporation. This standard by the National Aerospace Technology and Application of Standardization Technical Committee (SAC/TC425) centralized. This standard drafting unit. China Academy of Space Technology Master unit. The main drafters of this standard. to open constant, Chen Kewei, Zhang Rong Bao, Zhang Wanyang.

This standard belongs to China Aerospace national standards. China Aerospace national standards applicable to national standards in the field of aerospace and revision Management, covering the management of space, space technology, space applications and services of the three fields, is to guide spacecraft and launch vehicle project management, engineering research System, space launch services, in-orbit satellite applications based activities. Spacecraft in our development process, often involving the concept of different orbits, and to use a lot of the argument. The different research units Orbital parameters and concepts used in symbols are not uniform, for spacecraft development and bring a lot of duplication of work communication barriers. Through rigorous set Justice and norms of classification and spacecraft orbit parameters, help track the use of a unified classification parameters and symbols can be further improved Spacecraft Engineering Cheng Development Coordination and academic exchanges consistency and effectiveness. Spacecraft Orbit classification and symbols commonly used parameters

1 Scope

This standard specifies the classification and spacecraft orbit parameters commonly used symbols spacecraft orbit. This standard applies to artificial earth satellites, spacecraft, space stations, and deep space probes and other spacecraft overall design, track design and related Technical activities. For the center of gravity of the body other than the Earth's deep space probes of other celestial bodies can refer to use.

2.1.1 Classification orbital eccentricity

2.1.1.1 circular orbit Eccentricity e satisfies the condition e = 0 the track. Orbital eccentricity near circular orbit approximately zero, the project is sometimes referred to a circular orbit.

2.1.1.2 elliptical orbit

2.1.1.3 parabolic orbit Eccentricity e satisfies the condition e = 1 track.

2.1.1.4 hyperbolic orbit Eccentricity e satisfies the condition e > track 1.

2.1.2 Classification by orbital inclination

2.1.2.1 anterograde track Inclination i satisfying the condition 0 ° <=i < orbit of 90 °.

2.1.2.2 retrograde orbit

2.1.2.3 polar orbit Inclination i satisfies the condition i = orbit of 90 °. Generally close to 90 ° inclination orbit, also known as polar orbits. Polar orbit referred to as polar orbit.

2.1.3 Classification by orbital altitude

2.1.3.1 Low Orbit Low orbital altitude orbit, orbital altitude is usually lower than 2000km. * * *

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 3102.1

Cited by

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